Wiki source code of 1 Communication

Version 50.1 by Ben on 2022/08/24 11:33

version	line-number	content
50.1	1	= =
1.1	2
	3	(% class="table-bordered" %)
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	8	\|(% rowspan="3" %) \|
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	11	\|(% rowspan="3" %) \|
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	14	\|(% rowspan="2" %) \|
	15	\|
	16	\|(% rowspan="11" %) \|(% rowspan="3" %) \|
	17	\|
	18	\|
	19	\|(% rowspan="3" %) \|
	20	\|
	21	\|
	22	\|(% rowspan="3" %) \|
	23	\|
	24	\|
	25	\|(% rowspan="2" %) \|
	26	\|
1.1	27
24.1	28	= WECON PLC =
1.1	29
44.1	30	== LX3V 串行通信 ==
31.1	31
20.1	32	Supported series: WECON LX2V/ LX2E/ LX3V/LX3VP/LX3VE/LX3VM
1.1	33
20.1	34	HMI Settings
1.1	35
20.1	36	\|Item\|Settings\|Note
	37	\|Protocol\|WECON LX2V/ LX2E/ LX3V/LX3VP/LX3VE/LX3VM\|
	38	\|Connection\|RS422/RS485\|
	39	\|Baud rate\|9600\|
	40	\|Data bit\|7\|
	41	\|Parity\|EVEN\|
	42	\|Stop bit\|1\|
	43	\|PLC station No.\|1\|
1.1	44
20.1	45	Address List
	46
	47	\|Type\|Device registers\|HMI registers\|Format\|Range\|Note
	48	\|(% rowspan="6" %)Bit\|X\|X\|Xo\|0~~303237\|
	49	\|Y\|Y\|Y o\|0~~303237\|
	50	\|M\|M\|M d\|0~~99999\|
	51	\|T\|T\|T d\|0~~99999\|
	52	\|C\|C\|C d\|0~~99999\|
	53	\|S\|S\|S d\|0~~99999\|
	54	\|(% rowspan="8" %)Word\|X\|X\|Xo\|0~~303237\|
	55	\|Y\|Y\|Y o\|0~~303237\|
	56	\|M\|M\|M d\|0~~99999\|
	57	\|T\|T\|T d\|0~~99999\|
	58	\|C\|C\|C d\|0~~199\|
	59	\|D\|D\|D d\|0~~7999\|
	60	\|S\|S\|S d\|0~~99999\|
	61	\|SD\|SD\|SD d\|8000~~9999\|
	62
	63	Cable Wiring
	64
	65	* RS485
	66
31.1	67	[[image:image-20220822172124-1.png]]
20.1	68
	69	* RS422
	70
31.1	71	[[image:image-20220822172228-2.png]]
20.1	72
30.1	73
20.1	74	✎Note:
	75
	76	* HMI COM3 is available in PI8000 series and COM3 is in COM2(hardware PIN 7 and PIN 8) .
	77	* If PLC <= 20 points,such as LX3V-1208/LX3V-0806 PLC,PLC RS485A and RS485B mean PLC COM2 RS485+ and RS485- .PLC COM2 can support modbus. Please refer to PLC COM2 setting manual.
	78
	79	[[https:~~/~~/drive.google.com/drive/folders/13rgso7oUlatZQN_SNEcJCcN4toEdDPoP?usp=sharing>>url:https://drive.google.com/drive/folders/13rgso7oUlatZQN_SNEcJCcN4toEdDPoP?usp=sharing]]
	80
43.1	81	== LX5V serial communication ==
28.1	82
34.1	83	This example introduces the establishment of serial port communication between Wecon V-BOX and LX5V. It is introduced through three parts: PLC software configuration, HMI software configuration, and hardware wiring.
20.1	84
	85	Software configuration of PLC
	86
	87	1）PLC programming software
	88
33.1	89	[[image:image-20220822172553-1.png]]
20.1	90
	91	2）New PLC project
	92
	93	Click New Project and select the PLC model.
	94
33.1	95	[[image:image-20220822172623-2.png]]
20.1	96
	97	3）Set Serial port parameters
	98
	99	Follow the steps below to configure Serial port parameters
	100
	101	Baud rate：115200
	102
	103	Data bit：8
	104
	105	Stop bit：1
	106
	107	Parity：No verification
	108
33.1	109	[[image:image-20220822172657-3.png]]
20.1	110
	111	4）Registers list
	112
33.1	113	[[image:image-20220822172730-4.png]]
20.1	114
33.1	115	V-BOX software configuration
28.1	116
35.1	117	1）V-BOX programming software
20.1	118
35.1	119	[[image:image-20220824104124-1.png]]
20.1	120
35.1	121	2）V-NET add device
20.1	122
35.1	123	Open V-NET client software → add device. As shown in the figure below, click "+" in the order of steps, and the Add Device window will pop up, enter the access key, password and remark, to add the device.
20.1	124
35.1	125	[[image:image-20220824104909-2.png]]
20.1	126
28.1	127
20.1	128	3）Set communication port parameters
	129
	130	Click the communication configuration button on the left to find the communication protocol with LX5V. After selecting the protocol, configure the communication parameters of the COM port.
	131
	132	Baud rate：115200
	133
	134	Data bit：8
	135
	136	Stop bit：1
	137
	138	Parity：No verification
	139
	140	[[image:image-20220811104012-1.png]]
	141
28.1	142
20.1	143	hardware connection
	144
	145	1）Hardware wiring diagram
	146
	147	This example introduces WeconHMI with LX5V PLC to establish communication through serial port. The connection diagram is as follows:
	148
28.1	149
	150
20.1	151	[[image:image-20220811103005-4.png]]
	152
	153	[[image:image-20220811103227-7.png]]
	154
	155	The above are all the steps for establishing serial port communication between Wecon HMI with LX5V PLC.
	156
45.1	157	== LX5V-N Ethernet communication ==
20.1	158
	159	This example introduces the establishment of Ethernet communication between Wecon HMI and LX5V. It is introduced through three parts: PLC software configuration, HMI software configuration, and hardware wiring.
	160
	161	Software configuration of PLC
	162
	163	1）PLC programming software
	164
	165	[[image:image-20220810164710-1.png]]
	166
	167	2）New PLC project
	168
	169	Click New Project and select the PLC model.
	170
	171	[[image:image-20220811115454-1.png]]
	172
	173	3）Set Ethernet port parameters
	174
	175	Follow the steps below to configure Ethernet parameters
	176
	177	PLC IP address：192.168.39.200
	178
	179	default gateway：192.168.39.1
	180
	181	subnet mask：255.255.255.0
	182
	183	[[image:image-20220811140530-2.png]]
	184
	185	4）Registers list
	186
	187	[[image:image-20220811102219-3.png]]
	188
	189	HMI software configuration
	190
	191	1）HMI programming software
	192
	193	[[image:image-20220810171237-4.png]]
	194
	195	2）New HMI project
	196
	197	Click New Project and select the HMI model.
	198
	199	[[image:image-20220810172010-5.png]]
	200
	201	3）Set communication port parameters
	202
	203	Click the project setting button on the left to configure the IP address of the HMI machine to ensure that the HMI and PLC IP remain in a local area network.
	204
	205	HMI IP address：192.168.39.201
	206
	207	default gateway：192.168.39.1
	208
	209	subnet mask：255.255.255.0
	210
	211	[[image:image-20220811170753-2.png]]
	212
	213	Next, click Communication Settings to configure the IP of the HMI communication object.
	214
	215	[[image:image-20220811163047-1.png]]
	216
	217	hardware connection
	218
	219	1）Hardware wiring diagram
	220
	221	This example introduces WeconHMI with LX5V-N PLC to establish communication through ethernet. The connection diagram is as follows:
	222
	223	[[image:image-20220811170248-1.png]]
	224
	225	The above are all the steps for establishing ethernet communication between Wecon HMI with LX5V PLC.
	226
	227	(% style="text-align:center" %)
6.1	228	[[image:1624348978863-771.png\|\|queryString="width=812&height=494" height="487" width="800" class="img-thumbnail"]]
1.1	229
23.1	230	= Rockwell PLC =
22.1	231
37.1	232	== (% id="cke_bm_5621S" style="display:none" %) (%%)MicroLogix ==
	233
	234	MicroLogix 1000/1100/1200/1400/1500; SLC 5/03 5/04 5/05 PLC-5
	235
	236	HMI Settings
	237
	238	\|Item\|Settings\|Note
	239	\|Protocol\|Allen-Bradlley MicroLogix\|
	240	\|Connection\|RS232\|
	241	\|Baud rate\|19200\|
	242	\|Data bit\|8\|
	243	\|Parity\|None\|
	244	\|Stop bit\|1\|
	245	\|PLC station No.\|1\|
	246
	247	Address List
	248
	249	\|Type\|Device registers\|Format\|Range\|Note
	250	\|(% rowspan="5" %)Bit\|I\|I d.d\|0.0~~255.15\|
	251	\|O\|O d.d\|0.0~~255.15\|
	252	\|B\|B nnhh.dd\|0.0~~ffff.15\|nn: block number (hex)
	253	\|S\|S d.d\|0.0~~255.15\|
	254	\|N\|N nnhh.dd\|0.0~~ffff.15\|nn: block number (hex)
	255	\|(% rowspan="9" %)Word\|S\|S d\|0~~255\|
	256	\|TS\|TS nnhh\|0~~ffff\|(% rowspan="8" %)nn: block number (hex)
	257	\|TP\|TP nnhh\|0~~ffff
	258	\|CS\|CS nnhh\|0~~ffff
	259	\|CP\|CP nnhh\|0~~ffff
	260	\|N\|N nnhh\|0~~ffff
	261	\|C\|C nnhh\|0~~ffff
	262	\|T\|T nnhh\|0~~ffff
	263	\|R\|R nnhh\|0~~ffff
	264
	265	Cable Wiring
	266
	267	[[image:image-20220824110724-1.png]]
	268
	269
	270
	271	== CompactLogix ==
	272
11.1	273	(((
16.1	274	(((
38.1	275	This example introduces the establishment of Ethernet communication between Wecon V-box and CompactLogix L1769. It is introduced through three parts: PLC software configuration, V-box software configuration, and hardware wiring.
16.1	276	)))
11.1	277	)))
	278
	279	(((
15.1	280	(% class="wikigeneratedid" id="HSoftwareconfigurationofPLC" %)
	281	(((
	282	Software configuration of PLC
11.1	283	)))
	284
15.1	285	(% class="wikigeneratedid" id="HPLCprogrammingsoftware" %)
11.1	286	(((
15.1	287	1）PLC programming software
	288	)))
11.1	289
17.1	290	[[image:image-20220714162600-1.png]]
11.1	291
15.1	292	(% class="wikigeneratedid" id="HNewPLCproject" %)
11.1	293	(((
15.1	294	2）New PLC project
11.1	295	)))
	296
	297	(((
16.1	298	(((
15.1	299	Click New Project and select the PLC model.
11.1	300	)))
16.1	301	)))
11.1	302
	303	(((
17.1	304	[[image:image-20220714162617-2.png]]
11.1	305	)))
	306
	307	(((
17.1	308
16.1	309
17.1	310	[[image:image-20220714162652-4.png]]
11.1	311	)))
	312
	313	(((
15.1	314	(% class="wikigeneratedid" id="HSetEthernetparameters" %)
	315	(((
	316	3）Set Ethernet parameters
	317	)))
11.1	318
	319	(((
15.1	320	(((
16.1	321	(((
11.1	322	Follow the steps below to configure Ethernet parameters
	323	)))
15.1	324	)))
16.1	325	)))
11.1	326
	327	(((
15.1	328	(((
16.1	329	(((
11.1	330	PLC IP address：192.168.40.101
	331	)))
15.1	332	)))
16.1	333	)))
11.1	334
	335	(((
15.1	336	(((
16.1	337	(((
11.1	338	default gateway：192.168.40.1
	339	)))
15.1	340	)))
16.1	341	)))
11.1	342
	343	(((
15.1	344	(((
16.1	345	(((
11.1	346	subnet mask：255.255.255.0
	347	)))
15.1	348	)))
16.1	349	)))
11.1	350
	351	(((
17.1	352	[[image:image-20220714162713-5.png]]
11.1	353	)))
	354
	355	(((
	356
	357	)))
	358
	359	(((
15.1	360	(% class="wikigeneratedid" id="HV-boxsoftwareconfiguration" %)
	361	(((
	362	V-box software configuration
	363	)))
11.1	364
15.1	365	(% class="wikigeneratedid" id="HV-boxprogrammingsoftware" %)
	366	(((
	367	1）V-box programming software
	368	)))
11.1	369
15.1	370	(% class="wikigeneratedid" %)
	371	(((
17.1	372	[[image:image-20220714162725-6.png]]
15.1	373	)))
11.1	374
15.1	375	(% class="wikigeneratedid" id="HConfiguredevicenetwork" %)
	376	(((
	377	2）Configure device network
	378	)))
11.1	379
	380	(((
15.1	381	(((
16.1	382	(((
11.1	383	Click the Configuration Download button[[image:image-20220714115308-8.png\|\|height="22" width="15"]], It is used to configure the device network, update the device time, obtain the device machine code, check the device network, etc.
	384	)))
16.1	385
	386	(((
	387	In the example below, the IP address of V-Box is configured as 192.168.40.66, and the networking method is 4G connection
15.1	388	)))
16.1	389	)))
	390	)))
11.1	391
	392	(((
15.1	393	(((
17.1	394	[[image:image-20220714162737-7.png]]
16.1	395
	396
11.1	397	)))
	398	)))
	399	)))
	400	)))
	401
15.1	402	(% class="wikigeneratedid" id="HV-netadddevice" %)
11.1	403	(((
15.1	404	3）V-net add device
11.1	405	)))
15.1	406	)))
11.1	407
	408	(((
16.1	409	(((
21.1	410	Open VNET client software → add device. As shown in the figure below, click "+" in the order of steps, and the Add Device window will pop up, enter the device machine code/product code, device password, and device alias to add the device. [[image:image-20220714162752-8.png]]
11.1	411	)))
	412
	413
	414	)))
	415
	416	(((
15.1	417	(% class="wikigeneratedid" id="HSetcommunicationportparameters" %)
	418	(((
	419	4）Set communication port parameters
	420	)))
11.1	421
16.1	422	(((
	423	In the device list on the left, find the Vbox that communicates with the L1769, click it and select configuration,communication port configuration in the main interface to add a communication protocol.
11.1	424	)))
	425
17.1	426	[[image:image-20220714162805-9.png]]
16.1	427	)))
	428
	429	(((
11.1	430	The communication port is selected as Ethernet, the device type is selected as Allen-Bradley, the protocol is Allen-BradleyMicro850_FreeTag EthemetIP, and the IP is the internal IP address of the L1769 PLC. The port number is 44818.
16.1	431	)))
11.1	432
17.1	433	[[image:image-20220714162814-10.png]]
11.1	434
	435
16.1	436	(((
22.1	437	After adding the protocol Allen-BradleyMicro850_FreeTag, click[[image:image-20220714143838-2.png]]icon add label.[[image:image-20220714162827-11.png]]
16.1	438	)))
14.1	439
16.1	440	(% class="wikigeneratedid" id="HEngineeringproduction" %)
	441	(((
	442	5）Engineering production
	443	)))
14.1	444
16.1	445	(% class="wikigeneratedid" %)
	446	(((
	447	(((
	448	According to your own needs, use the V-NET client software to edit the required data monitoring points.
	449	)))
14.1	450
17.1	451	[[image:image-20220714162841-12.png]]
14.1	452
16.1	453
	454	(((
	455	hardware connection
	456	)))
	457	)))
	458
	459	(((
	460	1）Hardware wiring diagram
	461	)))
	462
	463	(((
	464	(((
	465	This example introduces Wecon V-box with Allen-Bradley L1769 PLC to establish communication through Ethernet. The connection diagram is as follows:
	466	)))
	467
17.1	468	[[image:image-20220714162856-13.png]]
16.1	469
	470	(((
41.1	471	The above are all the steps for establishing Ethernet communication between Wecon V-box with CompactLogix L1769 PLC.
26.1	472
	473
	474	== Allen-Bradley Ethernet DF1 ==
	475
	476	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Allen-Bradley%20Ethernet%20DF1.zip]]
	477
	478
	479	= Siemens PLC =
16.1	480	)))
	481	)))
	482
10.1	483	== Siemens S7-1200 ==
1.1	484
	485	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Communicate%20with%20S7-1200%20via%20Ehernet.zip]]
	486
10.1	487	== Communication with S7-200 Smart ==
1.1	488
	489	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Communication%20with%20S7-200%20Smart.zip]]
	490
26.1	491	= Delta PLC =
	492
10.1	493	== Delta DVP Ethernet ==
1.1	494
	495	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Delta%20DVP%20Ethernet.zip]]
	496
10.1	497	== Delta DVP Serial Protocol ==
1.1	498
	499	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Delta%20DVP%20Ethernet.zip]]
	500
47.1	501	= Mitsubishi PLC =
	502
10.1	503	== Communicate with Mitsubishi FX Series ==
6.1	504
	505	[[download link>>url:https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Communicate%20with%20Mitsubishi%20FX%20Series.zip]]
	506
10.1	507	== Communicate with VB inverter ==
6.1	508
	509	[[download link>>url:https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Communicate%20with%20VB%20inverter.zip]]
	510
48.1	511	= Omron PLC =
	512
10.1	513	== Omron CP1 Series ==
7.1	514
8.1	515	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Communication%20with%20ORMON%20CP1%20Series.zip]]
7.1	516
10.1	517	== Omron CJ2M ==
7.1	518
8.1	519	[[download link>>https://ftp.we-con.com.cn/Download/WIKI/V-BOX/Demo/%E9%80%9A%E8%AE%AF%E6%A1%88%E4%BE%8B/Communication%20with%20ORMON%20CJ2M.zip]]
7.1	520
50.1	521
	522	= Modbus RTU =
	523
	524	=== V-BOX as master ===
	525
	526	Select the protocol “(% class="mark" %)Modbus RTU Slave(All Fuction)”,
	527
	528	(% class="mark" %)then set BaudRate,Port,Stop Bit,Data Bit,Parity
	529
	530	(% style="text-align:center" %)
	531	[[image:1624342015914-382.png\|\|height="486" width="800" class="img-thumbnail"]]
	532
	533	=== V-BOX as slave ===
	534
	535	Select the protocol “(% class="mark" %)Modbus RTU Master”,
	536
	537	(% class="mark" %)then set BaudRate,Port,Stop Bit,Data Bit,Parity
	538
	539	(% style="text-align:center" %)
	540	[[image:1624348709622-711.png\|\|queryString="width=809&height=493" height="488" width="800" class="img-thumbnail"]]
	541
	542	Address List
	543
	544	(% class="table-bordered" %)
	545	\|Type\|Register\|Function code & Description
	546	\|(% rowspan="11" %)Word\|(% rowspan="3" %)3\|04 (read input register: read current binary value in one or more input registers)
	547	\|06 (write single register: write a binary value to a holding register)
	548	\|10 (write values to multiple addresses )
	549	\|(% rowspan="3" %)4\|03 (read holding register: read current binary value in one or more holding registers)
	550	\|06 (write single register: write a binary value to a holding register)
	551	\|10 (write values to multiple addresses )
	552	\|(% rowspan="3" %)W6\|03 (read holding register: read current binary value in one or more holding registers)
	553	\|06 (write single register: write a binary value to a holding register)
	554	\|10 (write values to multiple addresses )
	555	\|(% rowspan="2" %)W16\|03 (read holding register: read current binary value in one or more holding registers)
	556	\|10 (write values to multiple addresses )
	557	\|(% rowspan="11" %)Bit\|(% rowspan="3" %)0\|01 (Read coil state)
	558	\|05 (Force a single coil to force the on/off state of a logic coil)
	559	\|0F (Write multiple bits, ie write continuously)
	560	\|(% rowspan="3" %)1\|02 (Read the input state)
	561	\|05 (Force a single coil to force the on/off state of a logic coil)
	562	\|0F (Write multiple bits)
	563	\|(% rowspan="3" %)W5\|01 (Read coil state to obtain the current state of a set of logic coils)
	564	\|05 (Force a single coil to force the on/off state of a logic coil)
	565	\|0F (Write multiple bits)
	566	\|(% rowspan="2" %)W15\|01 (Read coil state to obtain the current state of a set of logic coils)
	567	\|0F (Write multiple bits)
	568
1.1	569	= 2 User define protocol =
	570
19.1	571	More serial port script instruction,please refer manual:[[Lua script function>>doc:V-BOX.V-Net.Manual.04 Lua Script.01 Lua Functions.WebHome]]~-~-->[[3.Serial port operation>>url:http://docs.we-con.com.cn/wiki/vbox/view/HMI/04.Lua%20script%20%20function%20and%20operation/01.Lua%20script%20function/#H3.Serialportoperation]]
1.1	572
10.1	573	== Read the temperature sensor. ==
1.1	574
	575	the commond format is as beliow:
	576
	577	Send commond:01 03 02 00 00 03 04 73
	578
	579	Feedback commond:01 03 06 07 F7 0E 7E B7 35
	580
	581	Temperature data:07 F7,desimal = 2039,it means temperature is 20.39℃.
	582
	583	Humidity data:0E 7E,desimal = 3710, it mean humidity is 37.10%RH.
	584
	585	Script Demo:
	586
	587	~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~--
	588
	589	function com.main()
	590	~-~-dosomething
	591	openPlc()
	592	end
	593	function openPlc()
	594	if obj then
	595	~-~- If the serial port opened,then read/write data by timing
	596
	597	local wri = string.pack(">HHHH",0X0103,0X0200,0X0003,0X0473)
	598	local arr = reading(wri)
	599	~-~- if arr ~~=nil then
	600	~-~- if arr[1] ==33 and arr[2] ==v[2][2] and arr[3] ==v[2][3] then
	601	~-~- local A = arr[4]*256
	602	~-~- local B = A+arr[5]
	603	~-~- addr_setword(v[1],B)
	604	~-~- end
	605	~-~- end
	606
	607	else
	608	~-~-judge if there is a serial object, then initialize and open the serial port
	609	local configs = {
	610	name = 'COM1', ~-~-Select serial port COM1
	611	mode = 485, ~-~-Communication mode RS485
	612	baud_rate = 9600, ~-~-Baud rate 9600
	613	stop_bit = 1, ~-~-stop bit 1
	614	data_len = 8, ~-~-data length 8
	615	check_bit = 'NONE', ~-~-no parity
	616
	617	}
	618	obj,err = serial.open(configs) ~-~-Open serial port
	619	if not obj then
	620	print("serial open :failed", err) ~-~- Open serial port failed
	621	end
	622	end
	623	end
	624
	625	function reading(wri)
	626	obj:flush() ~-~- Clear serial port
	627	obj:write(wri) ~-~- Write serial port
	628	print(string.byte(wri,1,#wri))
	629	obj:flush() ~-~- Clear serial port
	630	local readed =obj:read(9,1000) ~-~- Read 9 bytes, timeout 1 second
	631	if readed and readed ~~= "" then
	632	~-~- judge that a non-empty string is read
	633	print(string.byte(readed,1,#readed))
	634	a={string.byte(readed, 1, #readed)}
	635	if nil ~~= a[4] and nil ~~= a[5] and nil ~~= a[6] and nil ~~= a[7] then
	636	a1=a[4]*256+a[5]
	637	a2=a[6]*256+a[7]
	638	addr_setword("@HDW0",a1)
	639	addr_setword("@HDW1",a2)
	640	end
	641	return {string.byte(readed, 1, #readed)}
	642	elseif readed == nil then
	643	print("serial read err:", err or "")
	644	return nil
	645	end
	646	return nil
	647	end
	648
	649	~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-

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